The flywheel in Figure Q7 consists of two plates of mass m = 118 kg and thickness w = 0.05 m which are connected by arms of length 1 = 0.44 m into a rotating axis. An increasing moment M (N-m) is applied about the axis according to the expression M = 5t where t (s) is the time. Determine the time duration needed to accelerate the flywheel such that the plates reach a tangential velocity 20 m-s, if their initial velocity at time zero is 10 m-s. Provide only the numerical value (in seconds) to two decimal places (e.g. 10.25) and do not include the units in the answer box. Partial credit is awarded for a reasonable approximation to the correct numerical answer. m W Figure Q7: Accelerating flywheel 1 M -V 1 m W